Flash html5 canvas opens multiple tabs when the animation loops

I started tomake a fewtestsusinghtml5canvasand founda problemin one process.

I createdan animation of2 framesand at firstframethere is a button.
thenprogrammedforwhen you click thebuttonit opensa newtabin the browser andgo to the nextframeloopinganimation.
so far so good.
butwhen I returnto clickthe buttonit opens2tabsandmakethe loopagain, again I click thenew buttonit opens4tabsandso on.
why this happensand what would bea solution?
Thank you

here is thecodeof the firstframe:

this.stop();

this.button_1.addEventListener("click", fl_ClickToGoToWebPage);

function fl_ClickToGoToWebPage() {
    window.open("http://www.adobe.com", "_blank");
}

this.button_1.addEventListener("click", fl_ClickToGoToAndPlayFromFrame.bind(this));

function fl_ClickToGoToAndPlayFromFrame()
{
    this.gotoAndPlay(2);
}